Shooting with the Olympus OM-D E-M1 in Ireland, article and video.
OK, so maybe it's still in the honeymoon phase, never say never, but it does seem like the new Olympus OM-D E-M1 is the "what if they made a fully professional camera which weighed under 500 grams?" -camera. It's like the E-M5 on steroids. And the E-M5 is no weakling for sure.
And then you have all those outstanding lenses from Olympus and Panasonic in the Micro Four System to fit it. And it even has a new autofocus system which make it run the old, bigger but really high-end Four Thirds (without the Micro, meaning with a mirror) really well.
They say that the growth of the M4/3 system is a bit slow in the West. But I think that sooner or later it will be the 35mm format for the 21st century. I think it has the ideal sized sensor for it. The image quality is already a lot better than 35mm, and everything weighs about half and is smaller. And of course relative lightness and compactness (compared to medium format and larger) was what made 35mm the dominating format in the 20th century.